Hello. This is the Gravity Ragnarok Online Zero Operations Team.
A client patch was carried out on April 29th (Wed) at approximately 14:40 to fix an issue that allowed world movement to certain level-restricted maps regardless of level.
We apologize for the inconvenience, but please restart the game to apply the client patch before playing.
Please note that the client you were using must be closed in order for the patch to be applied properly.
Thank You.